The Kansas City metropolitan area is a bi-state metropolitan area anchored by Kansas City, Missouri. Its 14 counties straddle the border between the U.S. states of Missouri (9 counties) and Kansas (5 counties). With 8,472 square miles (21,940 km2) and a population of more than 2.2 million people, it is the second-largest metropolitan area centered in Missouri (after Greater St. Louis) and is the largest metropolitan area in Kansas, though Wichita is the largest metropolitan area centered in Kansas. Alongside Kansas City, Missouri, these are the suburbs with populations above 100,000: Overland Park, Kansas; Kansas City, Kansas; Olathe, Kansas; Independence, Missouri; and Lee's Summit, Missouri.
Yuanhui District is Luohe Municipal District, which is located in the central and southern part of Henan Province. Yuanghui District is the transportation hub of Henan Province, less than an hour's drive from Zhengzhou International Airport, 107 National Highway, Beijing-Guangzhou Railway, Beijing-Zhuhai Expressway running from the south to the north, Luobao and Luofu Railway, and Nanluo Expressway from east to west. Railways and expressways have a "double cross" structure. In 2012, the annual GDP of the Source and sink District reached 9.87633 billion yuan. In 2012, Yuanhui District has a total area of 201.6 square kilometers and a population of 320000. It has jurisdiction over 3 towns, 4 streets, one township, 109 administrative villages and 18 urban communities. It is the commercial, cultural and economic center of Luohe City.